How to Eliminate the Fault of Electronic Connecting Wire

The failure of the electronic connecting wire may be caused by the short circuit between the electronic harness and the terminal or the internal short circuit of the switch. Because the fault of breaking through the electronic wire in the middle is very rare, most of them are disconnected at the electronic connector.

From the above conclusion, if there is a fault, the staff should focus on checking whether the sensor and the connecting wire are loose and poor contact. Before inspection, first check whether the external terminal is firmly fixed, and then test according to the following steps. It should also be noted that for most wire connectors, the back-end should adhere to the connector insertion, but it is impossible to insert the back-end for the waterproof connector column, because it will be modified when you make a mistake accidentally.

The joint fracture fault caused by poor contact of terminal connector is often caused by the corrosion of connector end. External dirt enters the terminal or connecting socket, resulting in the reduction of contact pressure. The open circuit fault of wires and connectors may be caused by the use of broken wires and loose connector terminals.

First remove the wiring terminals on both sides of the control computer ECU and the sensor, and then measure the resistance between the corresponding terminals. If the resistance value is not more than 1 ohm, the wire is normal for the next inspection. At this time, just remove the connector and re insert it to change its connection status and restore its normal contact. It should be noted that when measuring the conductor resistance, it is best to gently shake the conductor in both vertical and horizontal directions to improve the accuracy of measurement.

Remove the wiring terminals on both sides of the controller and sensor, and then measure the resistance between each terminal block of connectors on both sides and the body. During measurement, one end of the gauge rod is connected to the body with iron, and the other end is measured on both sides of the conductor joint. If the resistance is greater than 0.5 ohm, there is no short circuit between the wire and the body.

How to Eliminate the Fault of Electronic Connecting Wire 1

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Have You Ever Used Tape Storage
As long as it is related to technology, "never say impossible" to technologies that seem to be outdated. When one day there is a "change of Dynasty", it may "make a comeback", or even become more usable or attractive, and become a good way to solve new problems.It can't be true? Are we stepping into the time machine now? Everyone knows that "tape" is... "Antique" technology! Don't all storage applications now use solid state disk (SSD) or hard disk drive (HDD) memory?The answer is not exactly right. In a recent article in the Wall Street Journal - "companies look to an old technology to protect against new threats", it is mentioned that many companies store data on tape again in case. This is not just an anecdote: there are some powerful data certificates in the market, the unit shipment of tape has increased, and more and more data is stored on tape.Although tape is not as easy to access as SSD or HDD memory, this attribute is also an advantage, especially when the "worst" situation occurs, it can show its strong and slow recovery mechanism. In addition, because tapes cannot be "online", hackers are unlikely to access them. The Wall Street Journal article pointed out that "the government, financial services companies, medical insurance companies and other regulated industries still use tape as a backup system for digital records. Now, some companies are turning back to tape technology because hackers are becoming more and more powerful in penetrating their preventive measures."If you still stick to the old idea that tape is a large volume of disk, it is really out of date; In fact, there are only some archive disks left, and we are lucky to find the playback device. At present, the tape industry has standardized on the easy-to-use tape cartridge, so that it can play and rewind through the manipulator under the large array configuration of the tape drive "field", as shown in the table. Even with the assistance of the international tape storage Council, some standards began to appear, focusing on defining overall dimensions and formats, etc. Tape storage Council is an industry organization established in 2012 to promote the technological innovation and application of tape storage industry.Modern tape drives (lto-7) can be equipped with backup and restore performance up to 750mb / S (2.7tb / HR), and each cartridge can support 15tb of data (source: quantum Corp.)Two key criteria: ltfs and LTOThe two key standards of tape technology are linear tape file system (ltfs) - which can make tape "almost" like HDD; And the linear tape open (LTO) standard developed in the late 1990s as an alternative to the then proprietary tape format. In the "technology advances promote tape to new markets" report recently published by the tape storage Council, it briefly describes the latest progress and application of tape technology.The comparison of tape with SDD or HDD is not limited to security; The tape storage Council believes that reliability and bit error rate (BER) also deserve attention. As shown in the figure below, the quantum lto-7 has an error every 1019 bits, while the HDD of the top gauge has an average error of 1016 bits. The difference of up to three orders of magnitude is really impressive. Other performance comparisons between tape and HDD are also noteworthy, and may even break the traditional myth.Comparing different data storage media shows that high-performance tape provides the lowest bit error rate, even 1000 times better than other technologies (source: tape storage Council)The tape system is also a miniature analog signal and wireless transmission link, even if the stored data is digital. In many ways, it is similar to RF channel, except that RF is replaced by magnetic field for energy transmission. In addition, it also has all the problems that affect the RF "wireless" link, such as jitter, signal-to-noise ratio (SNR), inter symbol interference, signal strength change and so on.Of course, the reading channel starts with the analog preamplifier (installed as close to the reading head itself as possible) and the variable gain amplifier (VGA). But that is only the beginning of analog signal processing, because advanced tape systems use read channels with partial response, maximum likelihood (PRML) signal detection circuits to maximize the chance of successful and zero error data restoration (although the channel is irregular). Although the physical scale may be much smaller than the RF link, the signal path blocks are similar.There seems to be a development element contrary to "going back to the future". Tape is not only the first high-density data storage mechanism (much earlier than HDD), but also an early "amateur" - personal computers (PCS) use Philips Consumer audio tape cartridges as low-cost storage media (of course, low-speed and low-capacity), load the operating system and store programs and data through the "boot loader". Today, tape is not cost-effective for hobbies and business applications, especially high-density HDDs, which are more affordable and random access, but potential tape technology still plays a vital role - and even the trend of "comeback".As usual, I would like to reiterate once again: as long as it is related to technology, it is "never impossible" to say what seems to be outdated technology. When one day the "dynasty changes", it may "reappear in the Jianghu", or even become more usable or attractive, and become a good way to solve new problems.Have you used advanced LTO / ltfs tape technology? Or have you ever used tape storage before?
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